Saturn's spongey moon Hyperion | Space is Weird
Go to http://brilliant.org/DrBecky and sign up for free. The first 200 people that go to that link will get 20% off the annual premium subscription. Saturn's moon Hyperion is the poster child for the potato-shaped moons in the solar system. But unlike other potato-shaped moons, it's not thought to be a captured asteroid. So, does it's weird spongey looking surface give away how it might have formed? #spaceisweird #weirdisgood Thomas et al. (2007) - https://www.nature.com/articles/nature05779
Matthews (1992) - http://articles.adsabs.harvard.edu/pdf/1992QJRAS..33..253M
Cruikshank et al. (2007) - https://www.nature.com/articles/nature05948 -- The artwork in the background is a scientifically accurate map showing the orbits of more than 18000 asteroids in the Solar System, created by Eleanor Lutz. Find out more and buy one here: https://eleanorlutz.com/mapping-18000-asteroids --- 🔔 Don't forget to subscribe and click the little bell icon to be notified when I post a new video! ---- 📚 My book: "Space at the speed of light" is now available in the USA & Canada! Order your copy here: https://www.penguinrandomhouse.com/books/635406/space-at-the-speed-of-light-by-dr-becky-smethurst/ 📚 For anywhere else in the world you can buy my book here (Space: 10 Things You Should Know - same book, different title) here: http://bit.ly/SpaceDrBecky --- 🔭 Royal Astronomical Society podcast that I’m co-hosting 😱 🥳- podfollow.com/supermassive --- 📹 Dr. Becky also presents videos on Sixty Symbols: https://www.youtube.com/user/sixtysymbolsand Deep Sky Videos: https://www.youtube.com/user/DeepSkyVideos --- 👩🏽💻 Dr Becky Smethurst is an astrophysicist researching galaxies and supermassive black holes at Christ Church at the University of Oxford.
3 of the Strangest Moons in the Solar System
The solar system is full of strange things. But these three moons are especially strange, and kind of ... ugly. Hosted by: Caitlin Hofmeister
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Giant impact: Janes DM and Melosh HJ. Sinker Tectonics: An Approach to the Surface of Miranda. JGR 1988, 93:B4, 3127--3143.
Faulting: Pappalardo RT, Reynolds SJ, and Greely R. Extensional tilt blocks on Miranda: Evidence for an upwelling origin of Arden Corona. JGR 1997, 102:6, 13,369--13,379.
Sublimation: Denk T, Neukum G, Roatsch T, et al. Iapetus: Unique Surface Properties and a Global Color Dichotomy from Cassini Imaging. Science 2010. 373, 435--439.
Ridge leftover from squatter Iapetus: Porco CC, Baker E, Barbara J, et al. Cassini Imaging Science: Initial Results on Phoebe and Iapetus. Science 2005, 307, 1237--1242.
Ring origin of ridge: Ip, W-H. On a ring origin of the equatorial ridge of Iapetus. Geophysical Research Letters 2006. 33:16, L16203.
Weird cratering: https://www.jpl.nasa.gov/news/news.php?feature=4606
Chaotic orbit: Wisdom J, Peale SJ, Mignard F. The chaotic rotation of Hyperion. Icarus 1984, 58:2, 137--152.
Bunch o’ rock: https://solarsystem.nasa.gov/planets/hyperion
Charge: https://saturn.jpl.nasa.gov/news/2790/cassini-caught-in-hyperions-particle-beam/ Image Sources:
Saturn's Moon: Hyperion Rotation
Hyperion (pronounced /haɪˈpɪəriən/, or as in Greek Ὑπερίων), also known as Saturn VII, is a moon of Saturn discovered by William Cranch Bond, George Phillips Bond and William Lassell in 1848. It is distinguished by its irregular shape, its chaotic rotation, and its unexplained sponge-like appearance.
The moon is named after Hyperion, a Titan in Greek mythology. It is also designated Saturn VII. The adjectival form of the name is Hyperionian.
Hyperion's discovery came shortly after John Herschel had suggested names for the seven previously-known satellites of Saturn in his 1847 publication Results of Astronomical Observations made at the Cape of Good Hope. William Lassell, who saw Hyperion two days after William Bond, had already endorsed Herschel's naming scheme and suggested the name Hyperion in accordance with it. He also beat Bond to publication.
Hyperion is one of the largest highly irregular (non-spherical) bodies in the solar system (second to Proteus). The largest crater on Hyperion is approximately 121.57 km in diameter and 10.2 km deep. A possible explanation for the irregular morphology is that Hyperion is a fragment of a larger body that was broken by a large impact in the distant past. Like most of Saturn's moons, Hyperion's low density indicates that it is composed largely of water ice with only a small amount of rock. It is thought that Hyperion may be similar to a loosely accreted pile of rubble in its physical composition. However, unlike most of Saturn's moons, Hyperion has a low albedo (0.20.3), indicating that it is covered by at least a thin layer of dark material. This may be material from Phoebe (which is much darker) that got past Iapetus. Hyperion is redder than Phoebe and closely matches the color of the dark material on Iapetus.
Hyperion has a porosity of about 0.46. Discovered by William Bond, George Bond, William Lassell
Discovery date 16 September 1848
Alternate name Saturn VII
Semi-major axis 1,481,009 km
Orbital period 21.276 d
Inclination 0.43° (to Saturn's equator)
Satellite of Saturn
Dimensions 328 km × 260 km × 214 km
(geometric mean 263 km)
Mean radius 135.00±4.00 km
Mass 0.5584±0.0068×1019 kg
Mean density 0.5667±0.1025 g/cm3
Equatorial surface gravity 0.0170.021 m/s2 depending on location
Escape velocity 4599 m/s depending on location .
Rotation period chaotic
Axial tilt variable
Apparent magnitude 14.1
Cassini Says "Goodbye" to Saturn's Moon Hyperion | Space Video
More space news and info at: http://www.coconutsciencelab.com - NASA's Cassini spacecraft has returned images from its final close approach to Saturn's moon Hyperion, one of the most bizarre objects in the solar system. The new views show Hyperion's deeply impact-scarred surface, with many craters displaying dark material on their floors. Hyperion is the largest of Saturn’s irregular, or potato-shaped moons and may be the remnant of a violent collision that shattered a larger object into pieces. During this flyby, Cassini passed Hyperion at a distance of about 21,000 miles (34,000 kilometers) at closest approach. Cassini's closest-ever Hyperion flyby took place on Sept. 26, 2005, at a distance of 314 miles (505 kilometers). Please rate and comment, thanks! Image Credits: NASA JPL-CalTech
Cassini's Final Rendezvous with Hyperion, moon of Saturn (May 2015)
Ride along with the venerable Cassini spacecraft, as it coasted by Saturn's weirdest moon in May, 2015. This movie is composed solely of frames taken with the narrow angle camera (NAC) through a variety of different filters.
Hyperion Flyby (moon of Saturn) 2010
Flyby of Hyperion by the Cassini spacecraft from November 2010. Movie composed of 61 frames taken with the narrow angle camera (NAC) through a variety of different filters.
Saturn Movie + Titan and Hyperion
This movie of Saturn's southern hemisphere taken by the Cassini spacecraft cameras shows a banded appearance due to winds, as well as dark cyclonic ovals.
The movie is comprised of 45 frames captured between February 6 and March 30, 2004, as Cassini coasted toward Saturn. The images were projected onto a rectangular longitude system to make a cylindrical map, with one map for each rotation of the planet that was captured by the cameras. These cylindrical maps (shown here also in movie form) were then projected back onto a globe-shaped Saturn.
This view of Saturn is similar to those seen in movies made from Cassini's encounter with Jupiter, except that in this case only the dark ovals are visible, not the background jets. The jets are there, but their features are much more muted. It is not yet clear whether all the ovals visible here are cyclonic, meaning that their winds flow in a counter-clockwise direction. However, the ovals resemble the cyclonic ovals Cassini spied on Jupiter. A few of the ovals seem to change their apparent direction of travel, from westward to eastward, as they change their latitude. This fascinating behavior was also noted by Cassini imaging scientists with ovals on Jupiter. Two mergers of ovals are captured in this sequence, one of which was reported previously. CREDIT: NASA